package com.itheima.reggie.common;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;

import java.io.File;

/**
 * 文件上传下载工具类
 */
public class FileUtils {
    /**
     * 文件上传
     *
     * @param endpoint        节点
     * @param accessKeyId     阿里云账号accessKeyId
     * @param accessKeySecret 阿里云账号accessKeySecret
     * @param bucketName      //Bucket名称
     * @param objectName      //Object完整路径
     * @param filePath        //本地文件的完整路径
     */
    public static void uploadFile(String endpoint, String accessKeyId, String accessKeySecret, String bucketName, String objectName, String filePath) {

//        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
//        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
//        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
//        String accessKeyId = "yourAccessKeyId";
//        String accessKeySecret = "yourAccessKeySecret";
//        // 填写Bucket名称，例如examplebucket。
//        String bucketName = "reggie-destiny";
//        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
//        String objectName = "exampledir/exampleobject.txt";
//        // 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。
//        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件。
//        String filePath = "D:\\localpath\\examplefile.txt";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new File(filePath));
            // 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。
            // ObjectMetadata metadata = new ObjectMetadata();
            // metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());
            // metadata.setObjectAcl(CannedAccessControlList.Private);
            // putObjectRequest.setMetadata(metadata);

            // 设置该属性可以返回response。如果不设置，则返回的response为空。
            putObjectRequest.setProcess("true");

            // 上传文件。
            PutObjectResult result = ossClient.putObject(putObjectRequest);
            // 如果上传成功，则返回200。
            System.out.println(result.getResponse().getStatusCode());
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

    }

    /**
     * 文件下载
     * @param endpoint  节点
     * @param accessKeyId  阿里云账号accessKeyId
     * @param accessKeySecret  阿里云账号accessKeySecret
     * @param bucketName   Bucket名称
     * @param objectName   Object完整路径
     * @param pathName     本地文件的完整路径
     * @throws Exception
     */
    public static OSSObject downloadFile(String endpoint,String accessKeyId,String accessKeySecret,String bucketName,String objectName,String pathName) throws Exception {
//        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
//        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
//        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
//        String accessKeyId = "yourAccessKeyId";
//        String accessKeySecret = "yourAccessKeySecret";
//        // 填写Bucket名称，例如examplebucket。
//        String bucketName = "examplebucket";
//        // 填写不包含Bucket名称在内的Object完整路径，例如testfolder/exampleobject.txt。
//        String objectName = "testfolder/exampleobject.txt";
//        String pathName = "D:\\localpath\\examplefile.txt";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

//        try {
//            // 下载Object到本地文件，并保存到指定的本地路径中。如果指定的本地文件存在会覆盖，不存在则新建。
//            // 如果未指定本地路径，则下载后的文件默认保存到示例程序所属项目对应本地路径中。
//            ossClient.getObject(new GetObjectRequest(bucketName, objectName), new File(pathName));
//        } catch (OSSException oe) {
//            System.out.println("Caught an OSSException, which means your request made it to OSS, "
//                    + "but was rejected with an error response for some reason.");
//            System.out.println("Error Message:" + oe.getErrorMessage());
//            System.out.println("Error Code:" + oe.getErrorCode());
//            System.out.println("Request ID:" + oe.getRequestId());
//            System.out.println("Host ID:" + oe.getHostId());
//        } catch (ClientException ce) {
//            System.out.println("Caught an ClientException, which means the client encountered "
//                    + "a serious internal problem while trying to communicate with OSS, "
//                    + "such as not being able to access the network.");
//            System.out.println("Error Message:" + ce.getMessage());
//        } finally {
//            if (ossClient != null) {
//                ossClient.shutdown();
//            }
//        }
        OSSObject ossObject = null;
        try {
            // ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
            ossObject = ossClient.getObject(bucketName, objectName);

            // 读取文件内容。
            System.out.println("Object content:");
//            BufferedReader reader = new BufferedReader(new InputStreamReader(ossObject.getObjectContent()));
//            while (true) {
//                String line = reader.readLine();
//                if (line == null) break;
//
//                System.out.println("\n" + line);
//            }
//            // 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
//            reader.close();
//            // ossObject对象使用完毕后必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
//            ossObject.close();

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (Throwable ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
//            if (ossClient != null) {
//                ossClient.shutdown();
//            }
        }
        return ossObject;

    }

}
